Method of producing clamping plates



Nov. 12, 1929. o. MELAUN 1,735,776

METHOD OF PRODUCING CLAMPING PLATES Filed July 19, 1926 s Sheets-Sheet 1 fizaeizior Nov. 12, 1929. o. MELAUN METHOD OF PRODUCING CLAMPING PLATES Filed July 19. 1926 5 She ets-Sheet 2 Nov. 12, 19 29.-

0. ME LAUN METHOD OF PRODUCING CLAMPING PLATES Filed July 19, 1926 5 Sheets-Sheet 3 m x {a Patented Nov. 12, 1929 wan OSCAR MELAUN, OF LANKE, NEAR BERLIN, GERMANY METHOD or rnonucrne CLAIVI PING PLATES Application filed Iuly 19, 1926, Serial No. 123,473, and in Germany July 22, 1925.

The present invention relates to improvements in a method for producing fish-plates. V In order to fully illustrate, there are three methods shown in the present application and illustrated in the drawings, in which Figure 1 is a perspective view of a double blank just previous to its being cut into lengths;

Figure 2 is a view illustrating the first step in making the first out;

Figure 3 is a view illustrating the next step and forming the longitudinal recess;

Figure 4 shows the next step in separating the blank into two fish-plates; Figure 5 is a front view of the completed fish-plate;

Figure 6 is a top plan view thereof; Figures 7 and 8 are, respectively, end and side views of another shaped blank from 20 which the present fish-plate can be made;

Figure 9 showsa method of forming the transverse depression therein;

Figure 10 is a View illustrating in dark sectional lines the portion to be out from the I blank;

Figure 11 shows the blank thus formed in perspective;

. Figure 12 is an end view showing in section 0, the portion to be cut out to form the base-receiving clamp; V

Figure 13 is a perspective view of the fin ished fish-plate;

Figure 14 is an interior View of'the roll bar;

Figure 15 is an end view thereof; Figure 16 is an end view of another form from which the fish-plate can be produced;

Figure 17 is an internal view of the plate, as shown in Figure 14 in its mold; V Figure 18 illustrates the first step in the rolling process of the bar shown in Figures 14 and 15;

Figure 19 illustrates the final rolling oper ation; 1

Figure 20 is a top plan view of the com plete fish-plate made from the'bar shown in Figure 14;

F igure 21 is a section taken on line 21 -21 of Figure 20; and

Figure 22 is a top plan View of a modified rel-m of fish-plate.

' rail or'girder. V 8 h The cut-away portion or opening J is then in each are identical," and that by these meth Method No. l The first method of making 7 l In this case, the blank E is cut'inlengths a. The blank is'then cut longitudinally to remove the section b, asin F igures'2 and 3, and the parts a are removed. As shown in Figure 4, the blank is separated longitudinal 1y to form the two oompleted'fish-plates T Method No. 2: As shownin Figures 8 to 13, thefish-plate is formed from the blank F,'having the reduced edge or flange d. The transverse depressionVis-formed by a press or hammer, as shown in Figure 9, and then the slug 9 is cut therefrom, as shown in Fig, ures 10 and 1 1. The cut it is now removed and thle fish-plate K, as shown in Figure 13, resu ts. 2

Method No. 3: As shown in Figures 14, 15, 17, 18, 19 and 20, the fish-plate K, as shown in F igures21'and 22 is formed. 1 The bar G in Figures 14 and '15 is rolled in the shape with the flange and the edge 3 delining the wide clamping groove. This rolled article is placed in the clamp L withthe edge y above the upper face of the bed. The roll w movingfrom the position of Figure 18 to that 'of Figure 19 compresses thefiange or Q edge 3 over the projecting portion P of the mold and thus gives it a better clamping action to fit closely upon'the base'web of a producedby milling or otherwise, and thus serves for the reception of a wedgeplate (not shown). s 5 As shown in Figure 22, two openings J in: stead of one for two wedge plates are provided.

The bar H, as shown in Figure 16, is also used as a basis for making the fish-plate K, but more particularly to produce the clamp t ing edge or flange k. r

From the foregoing description, it will be seen that although three methods of making the fish-plate are illustrated, the main steps sults.

'Iclaim:

1. A method of producing'clamping plates for girder constructions and the like, consisting in forming a groove in the middle part of a metallic blank, depressing this part over 2. A method a certain width and depth, and forming lateral length slots in the end parts of said blank.

of producing clamping plates for girder constructions and the like,

consisting in forming a groove in the middle part of a rod-shaped metallic blank, depressing this part over a certain width and depth, and forming lateral length slots in the end parts of said rod-shaped blank.

3. A method of producing clamping plates for girder constructions and the like, consistin in forming a groove in the middle part of a'metallicv blank of double breadth, de-

pressing this part over a certain width and depth, forming two lateral length slots in the end parts of said blank of double breadth, and finally cutting said blank of double breadth in the middle.

In testimony whereof I have hereunto set my hand. 7 e

' OSCAR MELAUN. 

